How deep you would have to dig to find water ice on Mars is shown by false colors in
this map made using THEMIS temperature measurements. Blue shows where ice would be 5
centimeters (2 inches) deep, while red shows an ice depth of more than 18
centimeters (7 inches). The region lies at 67.5 degrees north and 132 degrees east,
and the scale bar is 6.2 miles long. Click on the image to download a 1.7MB version.
Credit: NASA/JPL/Arizona State University
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